Electric-arc lamp.



'Patentpd Fpb. is; tanz.

. d 12 E y @Wil-nuns: 46 s pnvenozv:

@m venia' cw'ln zr-jm* 5% f A Y l Gtomzs 4 UNrraD STATES' PATENT Ormea.

SVEND MARTIN MEYER, OF BROOKLYN, NEW YORK, ASSIGNOR OF ONE# HALF TOFRANK O. KOHART, OF BROOKLYN, NEW YORK.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 693,663, dated February18, 1902.

Applicationled May 9, 1901. Serial No. 59,359. (No model.)

To all whom it may concern:

Be it known that I, SVEND MARTIN MEYER, a subject of the King ofDenmark, and a resident of Brooklyn, in the county of Kings and State ofNew York, have invented certain new and useful Improvements in ElectricArc Lamps,l of which the following is a specification.

This invention relates to an electric-arc lamp, and has for its objectthe formation of a lamp which shall be simple and economical inconstruction, accurate in operation, and durable.

With this object in view the invention consists in the construction andcombination of parts hereinafter fully described and claimed.

In the accompanying drawings, which form a part of this specification,the drawings illustrate so much of an arc-lamp only as is necessary todisclose the features of my invention, and therein said portion of thelamp is represented in vertical section in Figure 1 with the parts inidle position and in Fig. 2 with said parts in operating position, andFig. 3 is a horizontal section taken in the plane of line 3 3, Fig. 2.Fig. 4 is a detail sectional View on a larger scale.

My improvement is best applied to` an arclamp wherein the feeding of thecarbons is' controlled by a solenoid. In the drawings this solenoid isrepresented at 4. The core of said solenoid is indicated at 5 and ismade hollow for the reception of the upper carbon, which is indicated at6. ries the clutch controlling the feed of the carbon 6. This clutch ismounted upon the core in any suitable way, as by means of a post 7, towhich is hinged a plate8, preferably of soft iron. Through the upper endof said plate a screw,as 9, projects and extends into the interior ofthe core 5 through an opening therein, so as to engage the carbon 6.This engagement is induced and maintained by means 'of a weight 10,which is secured to the plate 8 by means of an arm 11, which may bescrewed to or otherwise attached to the plate 8, andvpreferably this arm11 encircles the core, thereby placing the weight 10 at the side of thecore opposite to the plate 8.

Coperating with the weight 10 in the opi part or the other.

The hollow core car.

eration of the clutch is an adjustable screw 12, located in a cross-baror plate 13, of insulating material or of metal suitably insulated fromthe side rods 14 of the lamp. There is also, preferably, a stop, as 15,located in the upper plate 16 of the lamp in position to engageand-limit the upward movement of the weight lO. cross-bar 13 anadjustable thimble, as 17, through which the upper carbon passes andupon which the core 5 may come to rest upon the lamps being cut out ofcircuit. This thimble also serves as a lower limit to the movement ofthe core 5 in the feeding operation of the lamp.

The solenoid 4 is preferably lined with metal, with which the core-mayengage and from which it may take current. This lining is indicated at18. To insure good electrical connection between the core and saidlining, suitable springs may be employed and located in any suitable wayand upon one One convenient location for such springs is indicated inthe drawings at 19, wherein the springs are shown seated in recesses inthe sides of the core 5. Vf

To prevent the rotation of the core upon its axis, any suitable meansmay' be employed-such, for instance, as a groove 20 in the interiorsurface of the lining 18 and a screw 21, located in the core andprojecting into said groove 20.

The circuit of the lamp is as follows: Starting from the conductor 22,it passes through the'solenoid-coil, thence to the liningof thesolenoid, as by'loop 23, thence to the lcore 5 and to the upper carbonby virtue of its coutact therewith throughout the length of the carbonWithin the core, thence through the lower carbon and to the side posts14, from which it may leave the lamp by conductor 24C.

Suitable jam-nuts may be employed to tix screws 9 and 12 in the desiredadjusted positions.

In the operation of the lamp the current when turned-on ows through thepath just indicated, thereby drawing the core into the solenoid untilstopped by the projection 25 on said core coming into engagement withthe plate 16. As said projection strikes the plate 16 the inertia of theball 10cm-ries the There is also in the plate or IOO same up against thepin 15, thereby loosening the grip of the screw 19 from the carbon andallowing the carbon to ascend by its inertia slightly into the core.Immediately thereupon the weight 10 descends and brings the screw 9again into engagement with the carbon, and the core 5, with the carbon,descends until the carbon 6 is at proper arcing distance from the lowercarbon 26. Then as the carbons are gradually burned away the coredescends until the weight 10 strikes the stop 12, when the carbon 6 isreleased and immediately runs into engagement with the carbon 26,thereby increasing the current through the solenoid and causing it tojerk the core 5 and carbon upward and bring it again into proper arcingposition. The gripping action of the weight may be assisted and thetendency of the weight upon any sudden movement of the lamp to releasethe clutch from the carbon may be counteracted by making the plate 8 ofsoft iron, whereby it may be under the attraction of the core 5 so longas any current is fiowing through the solenoid. The distance of travelof both the core and the weight is regulated by means of the collar 17and screw 12, respectively, and to some extent by the screw 9, thoughthe adjustability of the screw 9 is especially intended foraccommodating the clutch to carbons of various diameters.

The turns of the solenoid 4 may be insulated in any suitable way; but Iprefer to use a paste of infusorial earth for that purpose and to applyitasindicated in Fig. -namely, by spreading a layer of said paste on thespool, then winding on alayer of wire, then spreading another layer ofsaid paste and Winding on another layer of wire, and so on. This pastemay be formed by mixing thevearth with water oranysuitable volatileliquid, and when dry it forms an excellent porous insulation.

Many variations may be made from the form and arrangement of partsillustrated and described Without departing from the invention.

I claim as my invention- 1. In an electric-arc lamp, the combinationwith a solenoid, of a hollow core therefor adapted to carry the uppercarbon of the lamp, a lever pivoted to said core, a projection on saidlever passing through an opening in the core into position to engagesaid carbon, a weight connected to said lever for eecting saidengagement, and an adjustable stop for tripping the lever to release thecarbon to effect the feed.

2. In an electric-arc lamp, the combination with a solenoid, of a hollowcore therefor adapted to carry the upper carbon of the lamp, a leverpivoted to said core, a projection on said lever passing through anopening in the core into position'to engage said carbon, a weightconnected to said lever for effecting said engagement said lever beingof iron whereby it may be attracted by the core to assist the weight inholding the carbon and to act against the weight in the release ofthecarbon, and means for tripping the lever to release the carbon.

3. In an electric-arc lamp, the combination with the solenoid, of thehollow core therefor, a clutch-lever carried on said core, a'weight foractuating said lever, an adjustable stop for said weight and anadjustable stop for the core, substantially as set forth.

Il. In an electric-arc lamp, the combination with the solenoid, of ahollow core therefor, a clutch-lever carried on said core, a weight foractuating said lever, a stop on the core for limiting the upwardmovement thereof, a stop limiting the upward movement of the weight, andan adjustable stop for tripping said lever to feed the carbonsubstantially as set forth.

5. A coil for an electromagnet or solenoid consisting of one or morelayers of Wire which together with the convolutions or turns thereot'are insulated by a porous substance consisting of a paste of infusorialearth, substantially as set forth.

Signed at New York, in the county of New York and State of New York,this 27th day of April, A. D. 1901.

SVEND MARTIN MEYER.

Witnesses:

DELBERT H. DECKER, ETHEL L. LAWLER.

